SU1285218A1 - Apparatus for cooling and feeding sealing liquid - Google Patents

Abstract

The invention relates to chemical and petroleum engineering and can be used to supply the barrier fluid to the mechanical seals. The purpose of the invention is to increase the efficiency of the heat sink by fully utilizing the surface of the refrigerator at any level of liquid in the apparatus. A separator 11 with a cooler 10 is installed in the housing of the apparatus. The circulation of liquid through the apparatus occurs due to the difference in the densities of the cooled and non-cooled liquids. The liquid in the seal 28 enters the B cavity 16 of the separator 11, cools and flows back into the seal 28. As the fluid leaks in the seal 28, the liquid level in the apparatus decreases. The vacated volume is filled with the vapor-gas phase supplied through the nozzle 7, which is pushed out and whose forces cause the separator 11 to float in the liquid. The movement of the separator is controlled by a level indicator 8, made magnetic, which allows the seal to operate at elevated pressures. 3 h. the item of f-ly, 4 ill. (C (L

Description

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The invention relates to chemical and petroleum engineering and can be used to supply barrier fluid to mechanical seals installed, for example, in reactors.

The purpose of the invention is to increase the efficiency of the heat sink and expand the field of application.

FIG. 1 shows the apparatus, a longitudinal section; in fig. 2 - ring magnet, longitudinal section; in fig. 3 - ring with ferromagnetic inserts of the level indicator, longitudinal section; in fig. 4 - the same, top view.

The apparatus includes a housing 1, nozzles 2 and 3 for supplying barrier fluid, installed in the upper cover 4, a nozzle 5 for discharging the barrier fluid installed in the lower roof 6, a nozzle 7 for supplying the vapor-gas phase, a level indicator 8, shell 9 s. the cooler 10. In the housing 1 there is a separator, made in the form of a cylindrical cup 11, forming cavities 12 and 13 in the housing 1. The shell 9 is fixed on the bottom 14, which has holes 15 for communicating the cavity 16 of the shell 9 with the cavity 12 of the housing. The outlet 17 of the nozzle 7 is located in the cavity 18 of the Cup 11.

The level indicator 8 is made in the form of body 19 with UITOKOM 20 rigidly connected to the bottom one. We have 14 glasses 11.

The rod 20 is spring-loaded relative to the housing 19 by the springs 21 and 22, the spring 21 is nypulnena with greater capacity.

At the end of the rod 20, an annular magnet 23 is fixed, which may have a shell 24 and: a corrosion-resistant material. On the outer wall of the housing 19, a ring 25 is installed, which is a function of a recording device, with a ferromagnetic insert 26.

A nozzle 7 for supplying the vapor-gas phase is connected with the vapor-gas cavity of the reactor 27 to be sealed, and nozzles 3 and 5 are connected with a seal 28. The nozzle 7 has a choke 29 for draining excess barrier fluid. The housing 19 of the level indicator is provided with a stopper 30.

. rniapaT works in the following way.

After the apparatus and the end face were filled; 1 of the 28 was cooled by the barrier fluid through the nozzle 2, the cavity 18 communicated with the vapor-gas cavity of the reactor 27. As the reactor shaft rotates as a result of heat generation generated by friction of the mechanical seal 28 and heat coming from the reactor 27 through the shaft being sealed and, through the housing parts of the seal 28, the sealing fluid heats up. Due to the heating, the density of the barrier fluid contained in the seal 28 is reduced compared with the density of the cooled barrier fluid in the aspharate. As a result

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the resulting density difference begins its circulation in the system.

The heated shut-off liquid with a lower density is displaced from the seal 28 by a cooler, more dense-filled shutting fluid coming from the apparatus through the nozzle 5, and through the nozzle 3 enters the cavity 12 of the housing 1. It goes down through the gap between the walls of the cup 11 and the housing 1, and through the holes 15 and the gap between the shell 9 and the body of the refrigerator 10 is gradually cooled to a predetermined temperature.

The cooled barrier fluid through the nozzle 5 again enters the chamber of the hydraulic sub-support of the mechanical seal 28, and the process (cycle) is repeated again.

In the process of operation of the seal 28, loss of barrier fluid from the system occurs due to its leakage through the friction beds. These losses cause a decrease in its number in cavity 18. The vacant volume in cavity 18 is filled with the vapor-gas phase coming from the sealed reactor 27, while the ejection force acting on the cup 1 immersed in the liquid increases and it tends to float, transferring the force through the rod 20 rigidly connected with it to the spring 2, compressing it. Due to the use of a spring 21 with a large bearing capacity (perceived load) than the spring 22, the movement of the rod 20, and with it the level indicators 8 of the constant ring magnet 23 and the pointing ring 15 on the outer surface of the housing 19 will not be adequate. By moving the ring 25, the working (useful) volume of barrier fluid in the system is monitored. When refilling the apparatus with barrier fluid, the movement of the glass 11 occurs in the opposite direction, i.e. down. The gas nodushka, which is formed in the apparatus when refilling it with a barrier fluid, is vented to the atmosphere by opening the stopper 30.

Claims (4)

Invention Formula . An apparatus for cooling and supplying barrier fluid, comprising a housing, fittings for supplying barrier fluid, installed in the upper housing cover, a branch pipe for withdrawing the barrier fluid, installed in the lower housing cover, a fitting for supplying the vapor-gas phase, a level indicator and a shell with a refrigerator installed in the cavity of the housing, characterized in that, in order to increase the efficiency of the heat sink and expand the scope of application, it is provided with a separator, freely installed in the housing with the formation of two cavities and a cylindrical cup with an open end on the side of the lower body cover, a level indicator is installed in the upper cover and rigidly connected to the bottom of the glass, the shell is installed concentrically to the glass and fixed on its bottom, the steam and gas phase supply nozzle is installed in the lower housing lid so that its output The opening is located in the upper part of the cavity cavity, while in the bottom of the glass holes are made to communicate the inner cavity of the shell with the housing cavity above the separator. 2. The apparatus according to claim 1, characterized in that the level indicator is made in the form of spring-loaded stem mounted in the housing, an annular magnet fixed to the end of the stem, and a ring of magnetic material mounted on the outer wall of the housing, while the end of the stem without a magnet is fixed to the separator. 3. The apparatus according to claim 2, characterized in that the ring magnet is provided with a cover of corrosion-resistant material. 4. The device on PP. 2 and 3, characterized in that the ring is made of a polymeric antifriction material with ferromagnetic inserts. Срцг.2 25 ag 3 Phage.